Feature management
for developers
Manage feature flags, a/b tests, and remote configuration declaratively from your Git repository.
description: Flag for showing cookie banner
tags: - web - mobile
rules: - segments: EU # see next tab percentage: 100 # enabled for all
- segments: "*" # everyone else percentage: 0 # disabledPlatform agnostic
Works in frontend, backend, and mobileUse Featurevisor SDKs in your favourite languages and frameworks
Everything you need
Open Source & Purposefully Built
Carefully assembled set of features delivered to you as an Open Source tool to help you build better products, without locking you into any enterprise contract.
- Feature flags
- Classic feature toggles with on/off variations for enabling/disabling certain features.
- Experimentation
- Go beyond just boolean flags with multivariates enabling experimentation and A/B testing.
- Segmentation
- Target your audience with fine-grained conditions to control who sees what.
- Gradual rollouts
- Avoid big bang releases and roll out your features gradually to your users.
- Conditional variables
- Don't just store plain variable values, but also make them dynamic based on conditions for your runtime configuration needs.
- Consistent bucketing
- Makes sure the same user always sees the same variation across all devices and applications.
- Multiple environments
- No need to stop at just production and staging. Create as many environments as you need, or none at all.
- Tagging
- Tag your features accordingly so you only load the ones you need and nothing more, to keep your applications free of bloat.
- Force bucketing
- Allow your testers to force enable/disable certain features for themselves to gain higher confidence.
- Tracking
- SDKs support hooks for tracking how your experiments perform by integrating with your favourite analytics service.
- Testing
- Test your feature flags declaratively against multiple SDKs before deploying anything to gain maximum confidence.
- Universal SDKs
- Use JavaScript SDK in both Node.js and the browser, along with additional SDKs for cross-platform integration.
Manage with Git
Streamlined workflow for teams
Three simple steps to visualize the workflow:
Send Pull Requests
Your team sends Pull Requests to your Featurevisor project repository updating attributes, segments, and/or features.
Learn more
Build and upload to CDN
Upon merging your Pull Request, trigger your CI/CD pipeline to build the datafiles and upload them to your CDN.
Learn more
Fetch and consume with SDKs
Fetch the datafiles from your applications and evaluate features using the provided Featurevisor SDKs.
Learn moreThree types of evaluations
More than just feature flags
From simple on/off toggles to multivariate experiments and complex typed configuration. All managed declaratively from your Git repository.
Enable/disable a flag by targeting specific audiences
Toggle any feature for specific segments, like EU users, beta testers, or individual IDs — without touching your application(s).
bucketBy: userId
rules: - segments: EU percentage: 100 # enabled
- segments: "*" percentage: 0 # disabledRollout by segment
Weighted variations for running A/B or multivariate tests
Define multiple variations with traffic weights and connect to any analytics tool to measure which one wins.
variations: - value: control weight: 50
- value: green-cta weight: 30
- value: large-cta weight: 20Traffic split
Complex configuration, enforced by strict schemas
Variables can hold strings, numbers, JSON, and more. Validated against strict schemas to catch misconfigurations at build time.
variablesSchema: title: type: string defaultValue: Welcome
subtitle: type: string defaultValue: Text here...Supported types
The Git-native difference
Why manage with Git?
SaaS feature flag tools give you a dashboard.
Featurevisor gives you a workflow.
The same one your team already uses to ship code.
Every change is reviewed
Feature changes go through Pull Requests, the same process your code does. Your team reviews, approves, and merges with full confidence.
Full audit trail
Git is your audit log. See exactly who changed what, when, and why, with commit messages, PR descriptions, and full history. No black-box UI changes.
Test before you ship
Write declarative spec files to assert exactly what each feature evaluates to for any audience, then run them in CI before merging.
Zero-latency evaluation
Features are compiled into static JSON datafiles and served from your CDN. No extra network round-trips, no latency. Evaluations happen instantly in-memory.
Roll back instantly
Made a mistake? Revert the commit and your CI/CD pipeline undoes it automatically. No hunting through a dashboard. Just a simple Git revert.
Your infra, your rules
No SaaS subscription fees, no data leaving your environment. Host on your own CDN and CI/CD. MIT licensed. You own it completely.
SaaS dashboards
- Changes made in a UI, no review
- Audit logs locked behind pricing tiers
- No way to test features before applying changes
- SDK calls hit their servers at runtime
- Monthly subscription, vendor lock-in
Featurevisor
- All changes reviewed via Pull Requests
- Full history in Git. Forever, for free
- Declarative tests run in CI before merging
- Static JSON served from your own CDN
- MIT license, self-hosted, no lock-in
Deploy anywhere
Cloud-Native ArchitectureBring your own CI/CD tool and CDN, and Featurevisor will take care of the rest.
CI/CD Pipelines
builds & uploads
Cloud & CDN
Built for real teams
Use cases that fit your needs
From basic feature flags to advanced experimentation, Featurevisor has you covered with several organizational and operational problems that are very common in the industry.
Progressive delivery
Roll out features gradually to a subset of users for more control and confidence. No more big bang releases.
Testing in production
Unit test your feature configurations before exposing them to users. No more applying changes blindly and then praying for the best.
Remote configuration
Change application behaviour in real time using variables for complex configuration needs, without redeploying your application(s).
Microfrontends
Coordinate feature rollouts across independently deployed frontend modules, with a single source of truth for all teams.
Feature dependencies
Chain features together so one feature only activates when another is enabled, modeling complex release sequences cleanly.
Deprecating features
Retire old features safely by tracking usage, communicating timelines, and removing dead code with full confidence.
A/B testing & experiments
Run A/B or multivariate tests with weighted variations to validate hypotheses and make data-driven product decisions.
Trunk-based development
Ship to trunk continuously with features hiding incomplete work, leading to fewer merge conflicts and faster development cycles.
Feature ownership
Assign features to teams so they can ship independently, with clear accountability and zero coordination overhead.
Ready to ship with confidence?
Free, open source, and built for teams. No vendor lock-in, just powerful feature management from your repository.